جستجوی مقالات مرتبط با کلیدواژه "inflammatory effects" در نشریات گروه "پزشکی"

Sea urchins contain high values of antioxidant substances such as polyphenols.
In the present study, the antioxidant activities, α-amylase inhibition, anti-inflammatory activity and the amounts of phenols and flavonoids of purple sea urchin Echinometra mathaei tissues obtained from Persian Gulf were examined.
In December 2012, the purple sea urchin E. mathaei used for this study was harvested in the intertidal zone of Qeshm Island, Hormozgan Province, Iran. In the experimental design, extract isolation of different tissues of sea urchin such as spines, shells, gonads and Aristotle’s lantern was performed with the application of n-hexane, ethyl acetate and methanol solvents. Antioxidant properties of the samples were evaluated using different antioxidant tests such as total antioxidant capacity (TAC) and reducing power. The anti-diabetic and anti-inflammatory effects of samples were examined by inhibition of α-amylase and retardation of serum albumin denaturation, respectively.
With respect to antioxidant properties, the methanol extract of shell containing 40 μg/mL concentration possessed the maximum reducing power (OD = 0.475 ± 0.0049 and, ethyl acetate extract of Aristotle’s lantern at 1 mg/mL concentration presented the highest TAC (OD = 0.439 ± 0.0018). The n-hexane extract of gonad at a concentration of 1 mg/mL revealed the highest α-amylase inhibition (84.7 ± 2.92%). The ethyl acetate extract of Aristotle’s lantern at 20 μg/mL concentration possessed the highest anti-inflammatory property (69.78 ± 1.61 μg/mL). In biochemical analysis, the methanol extract of spine and ethyl acetate extract of Aristotle’ lantern had the highest phenolic (0.33 ± 0.017 mg/g) and flavonoid compounds (24.6 ± 0.72 mg/g), respectively.
The obtained results revealed that sea urchin extracts could be used in pharmaceutical industries. Furthermore, its application in food industries as a supplementary food can be of great value.

The inhibition of the inducible nitric oxide synthase (iNOS), cyclooxygenase 2 (COX-2) and nuclear factor-κB (NF-κB) production are research targets of attract in the field of antiinflammatory drug development. Therefore, this study was designed to investigate the anti-inflammatory effects of novel thiazolidinone derivatives using a cellular model of lipopolysaccharide (LPS)-stimulated murine macrophage RAW 264.7. In the present study, five new derivatives (A to E) of thiazolidinone were synthesized and screened for anti-inflammatory activities. Cell viability of LPS-stimulated RAW 264.7 macrophages clearly decreased in >55 μg/mL of synthesized A-E compounds especially in the presence of C; therefore, up to 50 μg/mL of compounds were selected for the subsequent analysis. A majority of these compounds showed significant inhibition on the production of NO in LPS-stimulated macrophages in a dose-dependent manner. Compounds B and D (10-50 μg/mL) significantly inhibited LPSinduced NF-κB (p65) production in a dose-dependent manner. The effects of B and D on iNOS and COX-2 mRNA and protein expression in LPS-stimulated RAW 264.7 cells were detected by real time-PCR and western blot. B derivative significantly suppressed the iNOS and COX-2 mRNA level and as well as protein expression. Taken together, these results reveal that compound B as new thiazolidinone derivative decreased expression of the inflammatory-related signals (NO, iNOS and COX-2) through regulation of NF-κB; hence, this compound could be suggested as a novel therapeutic strategy for inflammation-associated disorders.